Improvement in dampers



ALBERTTRACY. 4 `Improvement ih Dampers. V

" Patented-May23ll87'1.

PATENT OFFICE.

ALBERT TEAoY,`oF PARIS HILL, MAINE.

IMPRovl-:MENT l'N DAMPERS.,

" Specification forming part of `Letters Patent No. 115,135, dated May Q3, 1871.

I, ALBERT TRACY, of the United states army, now resident at Paris Hill, in the county of OxfordandState of Maine, have invented certain Improvements in Sets 7 or Fasteners for Dampers in Stoves, Stove-Funnels, Furnaces, andthe like, of which the following is a specification:

.Nature and Objects of the Intention. l My invention relates to the combination of i either an eccentric or right-line wedge with `the `shaft or boltllpon which the damper is` made to turn in such manner as that, when revolved to any given point, it may be set or heldin position.

Description of the Accompanying Drawing.

Figure l is a perspective view of the eccentric or damper-set embodying` my invention. Fig. 2 is a vertical section, showing themethed "of attaching the eccentric or `damper-set to the shaft-head and the operation thereof'.A Fig. 3 is a vertical cross-section, showing method of attaching eccentric or damper-set to shafthead and operation thereof. Fig. A is a verticalsection of right-line wedge as operated by cogor cogs pertaining to handle or lever. Fig. 5 is a'moditication, with a button or cone inverted Vupon the further end of shaft, as also with cast-iron band about pipe. Fig. 6 is a modification, with band of stove-pipe material and additional block for holding. Fig. 7 isa modication, showing the eccentric or damperset afxedto side of shaft. Fig. 8 is a modication, showing eccentric or damperset as operated by handle unattached. Fig. 9 is a l modification, showing plane with two boltsand two eccentrics, oneat either side. Fig. ll0 is a modification, showing double eccentrics affixed to the same shaft.

General Description.

A is the shaft or bolt, metallic, upon which the damper turns.` rlhe shoulder tted to prevent thebody of the shaft from entering too faruinto the pipe is, at its outer face, beveled tofan angle sufficient to give it a good holding surface. At the neck the shaft is flattened to a moderate extent, andrnear the head is made i a perforation transverse to the axis to admit of apivot, G; B is a metallic block, itted at the inner faceto the curve of the pipe, and

having-at its center a circular hole, reamed out or beveled next the pipe, to receive the shoulder of the shaft A. Smaller holes at the ends or sides, for both, are intended for rivets.

C is the eccentric or damper-set or fastener.l

It is constructed at the point essential to act -or operate in the form of the whole or a portion of a circle, eccentric to the point of turning. A handle or lever of convenient form and length extends in any given direction from the outer face or curve of the eccentric. Un-

derneath, or elsewhere about the circle, if desirable, is hollowed a mortise or opening, 'and at the center of a circle inferior to the eccentric and tangent within it a transverse hole corresponds in size with the hole in the head of shaft A for pivot G. Pivot Gin'place, and the body of shaft A beingpassed through the pipe E and damper F to the hole for the reception of its lesser end in the opposite side or at the base, and the block B being brought up and Vmade fast with rivets through its,` smaller holes, it follows that any depression of the handle or lever of the eccentric or` damper-set C, by Wedging up and bringing firmly into contact the bevel of the shaftshoulder with the reamor socket of the holding-block B, tends immediately to X and secure in positionl both the shaft and damper F as attached. -An opposite movement or elevation of the handle or lever of the eccentric or damper-set relieves the pressure, leaving free both damper and shaft to be turned to the right or left by the same appliance, and, if desirable, reset. The eccentric may be made to operate at any given point above or below, or at either side, lifting or pushing outward, or pressing downward, according as adapted by contact, either with portions of the shaft or with the holding-block, while it may also embrace or be embraced by the bolt or shafthead, or may be affixed at the side, Fig. 7. The handle or lever of the eccentric may be at either side, or at the top, or two or more projections may be adopted in lieu of a single I handle. Again, the handle of the eccentric or damperset may be wholly detached, forming a second piece, and made to operate by insertion into a second mortise or cavity, or between projections at the sides or on the outer curve of the eccentric, Fig. 8. When, in preference to the eccentric or circular form of wedge, a Wedge of right lines is to be used,

Fig. 4, it may be pushed forward or drawn backward and made to fix or release the damper by the operation of cogs, or their equivalent, upon a concentric with handle or lever, as aforesaid, either fixed or detached. The shaft may extend intact from the eccentric through the holding-block and pipe, with a button or shoulder, beveled or otherwise, to bear against a second block, I, from without, Fig. 6, as un der operation of the wedge or damper-set. This second block I, also, with its mate B, may be attached to a band, K, of stove-pipe material, to be slipped on or bound around the original pipe; or a solid band, L, may be cast to embrace in like manner the whole, and thus do away with the necessity of other form of purchase at either side, Fig. 5. The damperset when used in or about the more solid portions of stoves, furnaces, and the like, and for fixing in position dainpers for the direction or shutting off of Haine and heat, may nd similarl y ample purchase against the walls or castings themselves, and especially with a slight elevation provided for the contingency. If needful, bolts or shafts may be inserted into dainpers from opposite sides. and eccentrics or wedges of right lines attached from Without to each, to give a double strength and steadiness. I

My invention applies with equal value and effect not only to dampers in and about stoves, furnaces, and the like, but to any form of appliance or appurtenance, being in the nature of a plane, revolving or turning centrally upon pivots, and requiring at times to be fixed or set at given inclinations or angles. Of this nature are mirrors upon bureaus, dressing-cases, Ste., Fig. 9, ventilators, sashes of the lighter sort; blinds with their planes attached and revolving in a series or outside of these eccentrics, or their equivalent, may be attached as sets or checks to rollers for curtains or other light cylinders, Sac.

making fast in its position the projection intoor out of the shaft or button. Again, for strength or convenience double eccentrics may .be used on the same shaft, Fig. 10.

Claims.

I claim as my inventionl. The combination of the eccentric C and the shaft A with the block B, substantially as and for the purpose hereinbefore set forth.

2. The combination of the wedge of right lines and the shaft A with the block B and handle, with cog or cogs, substantially as and for the purpose hereinbefore set forth.

3, The combination of either the eccentric C or wedge of right lines and the shaft A with the blocks I3 and I, or either of them, or with the band K or the band L, substantially as and for the purpose hereinbefore set forth.

4. The combination of the eccentrics C or C and the shaft A, with or without blocks or bands, and with handle of eccentric attached or unattached, substantially as and for the purpose hereinbefore set forth.

5. The combination of the eccentric C or wed ge of right lines withthe shaft A, with or without button or cone inverted at further end, and with or without notch, or cog, or groove, substantially as and for the purpose hereinbcfore set forth.

ALBERT TRACY.

Vtituesses:

Guo. W. HU'roHiNsoN, L. A. RYERsoN. 

